package com.taylor.community.controller;

import com.google.code.kaptcha.Producer;
import com.taylor.community.entity.User;
import com.taylor.community.service.UserService;
import com.taylor.community.util.CommunityConstant;

import com.taylor.community.util.CommunityUtil;
import com.taylor.community.util.RedisKeyUtil;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.imageio.ImageIO;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import java.util.concurrent.TimeUnit;


@Controller
public class LoginController implements CommunityConstant {
    private static final Logger logger = LoggerFactory.getLogger(LoginController.class);
    @Autowired
    private UserService userService;
    @Autowired
    private Producer kaptchaProducer;
    @Autowired
    private RedisTemplate redisTemplate;
    @Value("${server.servlet.context-path}")
    private String contextPath;
    @RequestMapping(path = "/register", method = RequestMethod.GET)
    public String getRegisterPage() {
        return "/site/register";
    }
    @RequestMapping(path = "/login", method = RequestMethod.GET)
    public String getLoginPage() {
        return "/site/login";
    }
    @RequestMapping(path = "/register", method = RequestMethod.POST)
    //注册  model用于存储数据
    public String register(Model model, User user) {
        Map<String, Object> map = userService.register(user);
        System.out.println(map);
        if (map.isEmpty()) {
            model.addAttribute("msg", "注册成功，我们已经向您的邮箱发送了一封激活邮件，请尽快激活！");
            model.addAttribute("target", "/index");
            return "/site/operate-result";
        } else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            model.addAttribute("emailMsg", map.get("emailMsg"));
            return "/site/register";
        }
    }
    //激活
    // http://localhost:8080/community/activation/101/code
    @RequestMapping(path="/activation/{userId}/{code}",method= RequestMethod.GET)
    public String activation(Model model, @PathVariable("userId") int userId, @PathVariable("code")String code){
        int result = userService.activation(userId,code);
        if(result == ACTIVATION_SUCCESS){
            model.addAttribute("msg","激活成功，您的账号已经可以正常使用！");
            model.addAttribute("target","/login");
        }
        else if(result == ACTIVATION_REPEAT){
            model.addAttribute("msg","无效操作，该账号已经激活！");
            model.addAttribute("target","/index");
        }
        else{
            model.addAttribute("msg","激活失败，您提供的激活码不正确！");
            model.addAttribute("target","/index");
        }
        return "/site/operate-result";

    }
    //生成验证码图片
    @RequestMapping(path = "/kaptcha",method = RequestMethod.GET)
    public void getKaptcha(HttpServletResponse response/*, HttpSession session*/){
        //生成验证码
        String text = kaptchaProducer.createText();
        BufferedImage image = kaptchaProducer.createImage(text);

//        //将生成的验证码存到session 登录时从session中取
//        session.setAttribute("kaptcha",text);
        //验证码的归属
        String captchaOwner = CommunityUtil.generateUUID();
        Cookie cookie = new Cookie("captchaOwner",captchaOwner);
        cookie.setMaxAge(60);
        cookie.setPath(contextPath);
        response.addCookie(cookie);
        //将验证码存到Redis
        String redisKey = RedisKeyUtil.getCaptchaKey(captchaOwner);
        redisTemplate.opsForValue().set(redisKey,text,60, TimeUnit.SECONDS);



        //将图片输出给浏览器
        response.setContentType("image/png");
        try{
            OutputStream os = response.getOutputStream();
            ImageIO.write(image,"png",os);

        }
        catch (IOException e){
            logger.error("响应验证码失败："+e.getMessage());
        }
    }
    //rememberme表示UI界面是否选择”记住我“
    @RequestMapping(path = "/login",method = RequestMethod.POST)
    public String login(String username,String password,String code,boolean rememberme,
                        Model model/*,HttpSession session*/,HttpServletResponse response,@CookieValue("captchaOwner")
                        String captchaOwner){
        //@CookieValue用于获取cookie数据
//        //验证码在上一个方法中被存到session中
//        String kaptcha = (String) session.getAttribute("kaptcha");
        String captcha = null;
        //Cookie存放的临时凭证可能已经失效
        if(StringUtils.isNotBlank(captchaOwner)){
            String redisKey = RedisKeyUtil.getCaptchaKey(captchaOwner);
            captcha = (String) redisTemplate.opsForValue().get(redisKey);
        }
        //equalsIgnoreCase()方法表示不区分大小写
        if(StringUtils.isBlank(captcha) || StringUtils.isBlank(code) || !captcha.equalsIgnoreCase(code)){
            model.addAttribute("codeMsg","验证码不正确！");
            return "/site/login";
        }
        //调用service层的login方法检查账号和密码
        int expiredSeconds = rememberme ? REMEMBER_EXPIRED_SECONDS :DEFAULT_EXPIRED_SECONDS;
        Map<String ,Object> map = userService.login(username,password,expiredSeconds);
        if(map.containsKey("ticket")){
            //登录凭证要放到cookie中给客户端 方便下一次请求再次发给服务器（服务器进行比对后可以让客户无需登录）
            Cookie cookie = new Cookie("ticket",map.get("ticket").toString());
            cookie.setPath(contextPath);//设置该cookie生效路径
            cookie.setMaxAge(expiredSeconds);//设置cookie有效时间
            response.addCookie(cookie);
             return "redirect:/index";//重定向到index
        }
        else{
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
        }
        return "/site/login";
    }
    @RequestMapping(path = "/logout",method = RequestMethod.GET)
    public String logout(@CookieValue("ticket") String ticket){
        userService.logout(ticket);
        SecurityContext context = SecurityContextHolder.getContext();
        return "redirect:/login";
    }
}

